Miami Dolphins - TeamReport

The Dolphins received plenty of attention for spending big money on offensive weapons who can help out quarterback Ryan Tannehill.

But the team is also undergoing big changes at cornerback, and several veterans may be out of work come September.

Former Falcons Pro Bowler Brent Grimes was signed for one year and $3 million guaranteed to hold down one starting spot, assuming he can return fully from a torn Achilles suffered last September.

And the Dolphins spent three of their nine draft picks on cornerbacks --Boise State's Jamar Taylor in the second round, trading up to get Utah State's Will Davis in the third round and taking athletic prospect Don Jones in the seventh round.

Already the Dolphins traded former first-round pick Vontae Davis last year and let his running mate Sean Smith walk away in free agency in March. Now fourth-year pro Nolan Carroll, third-year veteran Jimmy Wilson and eight-year vet Richard Marshall will have tough competition for their jobs.

"Everybody has to earn their keep," Philbin said. "There's no preconceived notion that you're going to play X amount of snaps for any player. People earn play time by how they perform day-in and day-out on the practice field."

The Dolphins' cornerbacks had just three interceptions in 2012 by the entire unit -- two by Smith (both in Week 4) and one by Marshall, who suffered a back injury and sat out the final 12 games.

The Dolphins also have changed philosophy -- they liked the physical traits of Smith and Davis to play a lot of bump-and-run coverage under previous coordinator Mike Nolan, but now play a lot more zone coverage under Kevin Coyle.

While Smith was 6-3 and 220 pounds, Grimes, Taylor, Davis and Jones are all listed at 5-10 or 5-11 and between 183 and 192 pounds.

Other cornerbacks who will be competing for five or six total roster spots: Dimitri Patterson, R. J. Stanford, De'Andre Presley and Julian Posey.

"Coach will always say it's an open job, and if you come out and compete, you'll land wherever you're supposed to land," Davis said.

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NFL Team Report - Miami Dolphins - NOTES, QUOTES

Miami Dolphins CEO Mike Dee suggested Sunday the Dolphins may have to relocate at some point as a result of Friday's decision by the Florida legislature to reject hearing a referendum that would have provided public renovations to the Dolphins' Sun Life Stadium.

Dee had said last month owner Stephen Ross would not renovate the stadium without a public-private partnership. Ross reiterated that there will be no renovation in an interview with CBS4 in Miami, saying it would be "difficult" to do the renovations on a more limited basis.

Although Dee said Ross won't move the team, Dee said the next owner could move the team, possibly to Los Angeles. Ross has said he won't sell the team in his lifetime, but Dee didn't rule out a sale during Ross's lifetime.

"The Dolphins are one of the only franchises in the NFL that don't have a long-term lease with their community," Dee said, according to The Palm Beach Post. "At some point, somebody's going to buy the franchise from (Ross), and clearly the stadium is the first thing they would need to address."

--Two of the Dolphins top three picks didn't participate much at rookie minicamp, and will miss most of the offseason program. DE Dion Jordan, picked No. 3 overall, and OL Dallas Thomas, picked in the third round (77th overall), are both recovering from surgery to repair a torn labrum in their right shoulder.

Thomas had surgery shortly after suffering his injury at the Senior Bowl in January, while Jordan suffered his during the 2012 season and finally decided to have surgery in late February.

Both were working with trainers on the sideline during rookie camp, and Thomas will continue to do so without the spring. Jordan, meanwhile, wouldn't be able to participate anyway -- NFL rules prohibit players from practicing until they are done with school, which for Jordan will be June 17.

"The main thing is taking care of my body and doing what I can while I'm here as far as soaking everything up and just being around the guys," Jordan said.

--The Dolphins like the duo of Lamar Miller and Daniel Thomas at running back. They like the position depth even better after drafting Florida's Mike Gillislee in the fifth round.

Gillislee will contribute immediately on special teams, but the Dolphins like his decisive running style and his skills in pass protection, which isn't Miller's strong suit.

Gillislee wasn't a starter at Florida until his senior season, but broke out for 1,152 yards and 10 touchdowns.